fix: 工作控件查看按钮弹窗——MdWidget 外包 VScrollPanel，长文档可滚动不截断

wwwroot/api/workspace_view.dspy

@@ -34,15 +34,19 @@ ext = os.path.splitext(name)[1].lower()
 
 file_url = entire_url("/pipeline-sdlc/api/workspace_file.dspy") + "?id=" + quote(file_id)
 
-# txt/md → MdWidget 渲染
+# txt/md → VScrollPanel 包裹 MdWidget 渲染（可滚动，长文档不截断）
 md_exts = ['.md', '.txt']
 if ext in md_exts:
     return {
         "widgettype": "PopupWindow",
         "options": {"title": name + " (查看)", "width": "85%", "height": "85%", "auto_open": True, "resizable": True},
         "subwidgets": [{
-            "widgettype": "MdWidget",
-            "options": {"md_url": file_url, "width": "100%", "height": "100%"}
+            "widgettype": "VScrollPanel",
+            "options": {"css": "filler", "width": "100%", "height": "100%"},
+            "subwidgets": [{
+                "widgettype": "MdWidget",
+                "options": {"md_url": file_url, "width": "100%"}
+            }]
         }]
     }